If I understand, you say that on is just used to stress the importance of the date, while 2006 says that dated on indicates the day that the date was printed on a magazine.
From my perspective, 2006 and I agree.
Originally Posted by Englishlanguage
I'm afraid I really can't grasp the difference between dated and dated on. Is it really just a matter of importance? Is it just a nuance or does it completely change the meaning of the sentence?
It depends on the context. 2006's product example is a case in point. (I'll use yoghurt as the product.) A container of yoghurt is dated twice: one date tells us when the yoghurt was made, the other date tells us when the yoghurt expires. The dates on that container read,
Ex: The yoghurt dated to expire on 2007/07/03 ...
Ex: The yoghurt dated 2007/07/03 ....
Ex: The yoghurt dated on 2007/07/03 ....
Ex: The yoghurt dated on 2007/06/27.
Ex: The yoghurt dated 2007/06/27 ...
Now, with things that don't expire, like letters, things that have just the one date, the word dated points us to a reference number, whereas the phrase dated on tells us the date is contextually important:
Ex: In a letter dated on or about August 7, 1997, Mr. Plisner wrote to Ms. Krohn [on that day or about August 7]and asked for copies of certain data about D. Upon receiving no response, ... [/url=http://www.ipad.state.mn.us/opinions/1997/97047.html]Source[/url]
The author of that sentence could have omitted on or about and sentence would be as clear as it is now; however, adding on (or about) changes the meaning slightly in that it tells us the date that follows is important in some way:
Ex: In a letter dated August 7, 1997, Mr. Plisner wrote ...
I'll try to shematize it in a few points in order to fix ideas.
If I understand,
a) dated on is used:
a1) to stress the importance of a date
a2) when talking about products/writings/articles to refer to the exact date it was made/written/etc.
b) dated has a more general and less specific meaning